Initial Commit

iTechSharp/srcbc/crypto/parameters/GOST3410KeyParameters.cs

@@ -0,0 +1,58 @@
+using System;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.CryptoPro;
+using Org.BouncyCastle.Math;
+
+namespace Org.BouncyCastle.Crypto.Parameters
+{
+	public abstract class Gost3410KeyParameters
+		: AsymmetricKeyParameter
+	{
+		private readonly Gost3410Parameters parameters;
+		private readonly DerObjectIdentifier publicKeyParamSet;
+
+		protected Gost3410KeyParameters(
+			bool				isPrivate,
+			Gost3410Parameters	parameters)
+			: base(isPrivate)
+		{
+			this.parameters = parameters;
+		}
+
+		protected Gost3410KeyParameters(
+			bool				isPrivate,
+			DerObjectIdentifier	publicKeyParamSet)
+			: base(isPrivate)
+		{
+			this.parameters = LookupParameters(publicKeyParamSet);
+			this.publicKeyParamSet = publicKeyParamSet;
+		}
+
+		public Gost3410Parameters Parameters
+		{
+			get { return parameters; }
+		}
+
+		public DerObjectIdentifier PublicKeyParamSet
+		{
+			get { return publicKeyParamSet; }
+		}
+
+		// TODO Implement Equals/GetHashCode
+
+		private static Gost3410Parameters LookupParameters(
+			DerObjectIdentifier publicKeyParamSet)
+		{
+			if (publicKeyParamSet == null)
+				throw new ArgumentNullException("publicKeyParamSet");
+
+			Gost3410ParamSetParameters p = Gost3410NamedParameters.GetByOid(publicKeyParamSet);
+
+			if (p == null)
+				throw new ArgumentException("OID is not a valid CryptoPro public key parameter set", "publicKeyParamSet");
+
+			return new Gost3410Parameters(p.P, p.Q, p.A);
+		}
+	}
+}